Short answer
If your car stalls while driving, turn on the hazard lights and keep both hands on the wheel. Steering and brakes still work but feel heavy: steer firmly and press the brake hard and steady, without pumping it. Coast to the shoulder or a safe spot. Once stopped, put it in Park and try one restart. If it will not start or stalls again, call a tow.
Safety first
If you cannot get out of a travel lane, stay in the car with your seat belt on and the hazard lights flashing, and call 911. On a highway shoulder, get out only on the side away from traffic and wait well off the road, behind a barrier if there is one. Never stand behind or beside the car.
What to do when your car stalls on the road
1The engine dies while you drive
The RPM needle drops to zero and warning lights come on. The car keeps rolling for a while: use that time to reach a safe spot.
Read all the steps
- The engine dies while you drive. The RPM needle drops to zero and warning lights come on. The car keeps rolling for a while: use that time to reach a safe spot.
- Hazards on, steer and brake firmly. Without the engine, steering and brakes get heavy but still work. Hold the wheel firmly and press the brake hard and steady. Do not pump it.
- Coast to the shoulder or a safe spot. Signal and roll to the shoulder, a parking lot or a side street. If you cannot leave the lane, stop, stay buckled in and call 911.
- In Park, try one restart. Shift to Park and turn the key or press the start button once. If it starts, drive straight home or to a shop, off the highway.
- Stalls again? Call a tow. Do not keep trying on a busy road. Stay away from traffic and call a tow or a mobile mechanic. Tell them what happened right before it died.
- Call a tow or a mobile mechanic Especially if: it will not restart, or it stalls again.
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Common causes
- Out of gas, or a gas gauge that reads wrong.
- A weak fuel pump or a clogged fuel filter: it often dies going uphill or at highway speed.
- A failing alternator: the battery light comes on first, then the car dies when the battery runs out.
- A bad sensor, such as the crankshaft position sensor: it often dies when the engine is hot and restarts after it cools.
- A dirty throttle body or an air leak: it dies at idle or when you come to a stop.
What to tell the mechanic
Write down when it happened: hot or cold engine, at a stop or at speed, and any warning lights before it died. Note whether it restarted and how long that took. Ask the mechanic to read the stored codes even if the check engine light is off.
When to call a mechanic
- It will not restart, or it stalls again.
- The battery light came on before it died.
- It dies at stoplights or when the engine is hot.
- You smell gasoline.
Frequently asked questions
What should I do if my car stalls on the highway?
Turn on the hazard lights, keep a firm grip on the wheel and steer to the shoulder while the car still rolls. If you cannot get out of the lane, stay buckled in and call 911.
Why is the steering heavy when the car stalls?
In many cars the power steering needs the engine running. Without it you can still steer, but it takes much more effort.
Do brakes work when the engine dies?
Yes, but with much less help. The brake booster keeps enough assist for one or two presses, so press hard and steady instead of pumping.
Why does my car stall when I stop?
Often a dirty throttle body, an air leak or an idle control problem. It can also be a fuel or sensor issue. A mechanic can read the codes and test the idle.
Can a bad battery make a car stall while driving?
Usually it is the alternator, not the battery. When the alternator stops charging, the car runs on the battery until it is empty, and then it dies. A battery light is the early sign.
Is it safe to keep driving a car that stalled once?
Not on busy roads or highways until it is checked. If it dies again in traffic, it is dangerous. Stick to short local trips, or have it towed.